Photographic shutter



y 1932- A. BARENYI 1,861,256

PHOTOGRAPHIC SHUTTER Filed July 56. 1930 Patented May 31, 1932 i UNITED STATES PATENT OFFICE 341mm,. or nnnmn-mcnrnnrnnnn, climax rnoroonnrnrc snur'rnn I i Application fled July 30,- 1930, Serial No. 471,704, and in Germany Augult 7, 1828.

My invention relates to improvements in prises a casing 4 having a sprin driven photographic shutters, and more particularly motor or master member 5 mounte therein, in the actuating mechanism for the "blade the said member being provided with a gear mechanism. In constructions now in use the segment 6 adapted to operate a toothed ring 7 5 said actuating mechanism comprises a spring concentrically mounted on the casing 4 and driven motor or master member which when in driving engagement with pinions 35 seset and released opens and closes the blade cured to the shutter blades. The member 5 mechanism. Actuating mechanisms of this is provided with lugs 8 adapted to be engaged type have been provided with a detent mechaby a detent rockingly mounted on the eas- 1O nism for withholding the same in set osition ing 4 at 9 and terminating in a release lever 60 and releasing the same, and the sai detent 10, a spring 11 tending to hold the said demechanism has been provided with a retardtent in position for engagement with the ing device whereby the actuating mechanism lugs 8.' 1 is released a certain length of time after The detent 10 is adapted to be released by a operating the detent mechanism. The object releasing mechanism comprising a gear se'g 5 o the improvements is to construct the said ment 12 formed with a hub 13 and rocking y retarding device so that it is automatically mounted on a pivot bolt 14 fixed to the casing thrown out of operation when setting the 4. The said segment carries a pawl 15 rockdetent mechanism, and that it. is automatiingly mounted on apivot bolt 16, and a spring cally thrown into operation when releasing 17 fixed to a pin 18 normally holds the pawl in the detent mechanism, so that the detent the position shown in Fig. 2 and with its tail mechanism may be set without operating the end bearing on the pin 18. The segment 12 retarding device and at high velocity. With is -made integral with an arm 19 passed this object in view my'i'nvention consists in through a slot 20 of the circumferential wall mounting the retarding device on a frame of the casing 4. When rocking: the segment which is movable relatively to the detent 12 y means of the arm 19 in the direction mechanism for automatically disconnecting of the arrow'a: the pawl 15 passing the lever the retarding device from the detent mecha- 10 yields inwardly and thereafter it is nism when operating the detent mechanism pressed outwardly again by the spring 17.

30 and throwing the same into engagement The rocking movement of the segment 12 is therewith when releasing the same. limited by pins 21 and 22 cooperating with For the purpose of explaining the invena: stop member 23 fixed to the casing 4. To

tron an example embodying the same has been the hub 13 a spiral spring 24 is secured, which shown in the accompanying drawings in is secured with its opposite end to a pin 25,

' the said spring tending to return the segment 95 on used in all the views to indicate corre- 12 into the position shown in Fig. 1. sponding parts. In said drawings The segment 12 is connected with a re ig. 1 is a front fragmentary elevation of tarding' device comprisinga set of gear wheels the shutter with the cover of the shutter 26, a star wheel 27 and a pallet or anchor 28. casing removed, I The said retarding device is mounted on a ig. 2 is a sectional rear elevation on the frame rockingly mounted on a pivot bolt 29 line 2-2'of Fig. 3, and and comprising plates 30 and 31 connected ig. 3 is a sectional elevation taken on with each other by stay bolts 32, a spring the line 3-3 of Fi 1. 33 being provided for yieldingly holding the In the example rown in the figures the frame in the position shown in Fig. 1 and in shutter is of the modern type of pivoted engagement with a stop 34, in which position lads, symmetrical opening shutter an ext e firstgear wheel is in mesh with the gear ample "of which has been shown and desegment 12.

Ill

scribed in my copending application Ser. The operation of the apparatus is as folmo 50 No. 376,518 filed July 8, 1929, and it comlows:

including a pinion structurally united with '"such o 'ic-ration; 'hen releasing the arm 19' After the motor or master member 5 has been set it is temporarily locked in position by the detent engaging one of the lugs 8.

If it is desired to make an exposure the gear segment 12 is rocked by means of the arm 19 in the direction of the arrow .2 until its pin 21 engages the stop member and when thus rocking the gear segment the pawl '15 iassi'iw the level"1(Y'vields inwardly. At D .1

the beginning of the rocking movement of the segment 12'tlie frame 30, 31 is rocked in the'triain of gear wheels 26 is immediately thr 'vn by the spring 33 into engagement .witli the'gear segn'ient 12 whieh is therefore retarded.- After a certain length of time 'fd pendh g on'the resistanee of the train of its movement for operating the blade mecha- .1gearwheels ZGand the pallet 28 the pawl --e,ngages-ti1e-1e\-e1- 10 and rocks the same anticl ockwir-i'el and with the detent 10 out of locki n-giengagement' with the lug 8, and immediately thereafter the detent is released by the pawl 15 and rocked by the spring 11 into position for engagement with the next lug 8. In the meantime the master member 5 has begun ij-nism and it'is'arrested by the detent 1O engaging the nextlug 8.

. *From the foregoing description of the detent mechanism it will he understood that when setting the segment 12 the train of gear 1 wheels 26'is'thrown into and out of operation and that no mechanism such as a pawl and 'means foroperating the same are needed.

. I claim:

1 m1. In ai'ph'otographie shutter the combina- 'tion, with a shutter-operating motor and a motor-releasingdetent, of a manually rotatable member equipped with a detent-engag lug-pawl, aspring engaging said member and adapted to' beput under tension by l? manual'rotation of said member and, when 1 under tension, to rotate said member oppos1tely,1and means for retarding spring-1msaid-rotatable member and a gear-wheel wh1eh,"-1n -add1t1on to its essential property flof rotatability is movable bodily with respect tosaid-pinion betweenpositions of meshing and release with respect thereto.

i152. Thestru'et-ure 'of'elaim'l, the said geara spring engaging said gear-Wheel and tending to mamtain said gear-wheel in meshing lease so; p

position.

- 4. In a photogra'phie shutter the combinar tion of a casing, a shutter-operating motor mounted in said casing, a motor-releasing detent mounted in said casing, a detent swinging member rotatably mounted in said casing, a spring engaging the last-named member, adapted to be put under tension by manual rotation of said last-named member and when under tension to rotate said member 0ppositely, and means for retarding springimpelled rotation of said member, such means including a pinion structurally united with said member, a frame pivotally mounted in said casing, and a gear-wheel rotatably borne by said frame, the said frame being movable on its pivot between positions of gear-wheel meshing and gear-wheel release with respect to said pinion, and the said frame movable between such positions on the rotation of the said detent-swinging member, through the engagement of thepinion thereof with the, gear-wheel borne by the frame. 1

In testimony whereof I hereunto affix my signature. 

